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[aprssig] APRS Messenger now has APRS over PSK-63

Bob Bruninga bruninga at usna.edu
Mon Mar 1 04:04:21 UTC 2010


Why not usse grid square.  All of APRS programs can decode gridsquares.  And it is also highly compressed.
and good enough for HF DX

Bob, WB4APR


---- Original message ----
>Date: Sun, 28 Feb 2010 22:32:12 -0500
>From: aprssig-bounces at tapr.org (on behalf of "Lynn W. Deffenbaugh (Mr)" <ldeffenb at homeside.to>)
>Subject: Re: [aprssig] APRS Messenger now has APRS over PSK-63  
>To: TAPR APRS Mailing List <aprssig at tapr.org>
>
>Stephen H. Smith wrote:
>> I assume that once APRS Messenger gains the GPS input and capability 
>> to send posits, that this will work to put APRS posits on the map in 
>> any (or all) of these programs.    To make the most of the slow PSK 
>> transmission rate, I would strongly suggest that APRS Messenger use 
>> the highly-compressed MIc-E transmission format since it is about 
>> ONE-THIRD the length of a plain-text APRS posit. The downside is that 
>> it is not human-readable, although ALL APRS mapping applications can 
>> decode it.
>
>My only comment on the Mic-E format for APRS Messenger is that part of 
>the author's intent was to allow users to visually decode incompletely 
>received or partially garbled transmissions.  Yes, Mic-E will save 
>transmission time, but will take you back to the entire packet needing 
>to be received before any sense can be made of the position.
>
>Lynn (D) - KJ4ERJ - Just my $0.02
>
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